Pneumatic non-sinkable shield for boats.



C. CROWLEY.

PNEUMATIC NON-SINKABLE SHIELD FOR BOATS.

APPLICATION FILED JAN- 3,1914. 1,170,420. Patented Feb. 1, 1916.

5fifnmof I I a nvemjo vz I [id/2; (Iv/gig THE COLUMBIA PLANOGRAPH c0,WASHINGTON, D. c.

cnaianns CROWLEY, or .rnn'rnpansraanm.

To all whom it may concern: p I

Be it known that I, CHAnLns Gnownnr, a subject of the King of GreatBritain, and

residing at 177 Fitzgerald Street, Perth,

Western Australia, Commonwealthof- Aus tralia, have invented certain newand useful Improvements in Pneumatic Non-Sinkable Shields for Boats, ofwhich the following is a specification.

The object of this invention is to provide boats with a pneumaticnon-sinkable shield or outer hollow wall, said outer wall being in thenature and form of an attachment to said boat.

In this specification the word b'oat is intended to comprise and meanboats, ships and all other water borne vessels of any kind or nature.

The invention is particularly valuable for use with life saving boatsfor the purpose of rendering them safe and free from being swamped orsunk. Furthermore the use of this invention increases thebuoyancy andconsequently increases the carrying capacity vessels with an outersurrounding air chamher and with a resultant and intervening water spaceor cavity betweensaid air cham i or approximates the shape andconformation thereof and the resultant and intervening space whichexists betweenthe hull of longitudinal sectional View on line 00-00 ofIn said drawings a is the hull or shell of the boat as shown in brokenlines and to same 1s rlveted or otherwise secured the ribs '7) made ofsteel or iron plates of, any approved section. These ribs 6 are placedvertically as shown in Fig. 2. To these ribs are riveted or otherwisesecured the hollow wall I m mmmmmmsw sHInLn non BOATS.

which comprises the inner and outer shells and said wall in section ispreferably of a taper or wedge shape as shown in Fig.1. The space as ewhich exists between the boat fhull a andthewall c.cl acts as the waterspace and as previously stated communi: cates with the outer water ofthe ocean as denoted by the letter m and as seen in Fig. 1. This waterspace may extend upwardly to a line level with the top of the chamber.0rZ or to the main deck as f of the boat.

This hollow wall c-0Z is divided up into separate sealed tight cellularcompartments as 9 both .in a longitudinal vertical direc tion and whichmethodof construction allows of any onecompartment being injured orpunctured without endangering any neighboring compartment or the wall 0das a whole. vThe partitions which form the cellular compartments 9.connect the shells 0-0? and brace them to one another. water in thespace 6 communicates'with the water ofthe ocean m -by way of. the openmouthed passages j placed in proximity to the keel of the boat or wateropenings may be placed at other approved points of the wall 0'0l.

,It will be seen that by means of this'invention I obtain a water spacesurrounding .the boat and also an outer pneumatic wall provided by'thesealed chan1ber'cd.

When theinvention is employed with. smallboats such as rowing or sailingheats the wall 0,'d may be removably connected tothe boat by plates orstraps while the' keel edges of the boat and said wall may be hingedlyconnected to each other. i

What I claim as my invention and desire to secure by Letters Patent is.1. The combination with a conventional boat hull of an inclosing,structurally independent, continuous, hollow, air-filled wall comprisingas an entirety a pair of spaced shells connected and braced to oneanother, the said shells extending throughout the longitudinal andvertical depth of said hull and each conforming to the longitudinal andvertical outline thereof, and vertical plates arranged at suitableintervals and fixedly connecting the hull and the wall and alsodefinitely spacing the latter throughout its extent from the former, thewall being The wspecifioation tr Letters Patent. Patented Febll, 1916.Allplication fi led January 3,1914. serial-no. 810,192.

open at its loWer end adjoining the keel of the boat to provide opencommunication between the space intermediate the boat and the Wall andthe Water in Which the boat is borne.

2. The combination With a conventional boat hull of an inclosing,structurally independent, continuous, hollow, air-filled Wall comprisingas an entirety a pair of spaced shells, and means connecting saidshells, and bracing them to one another and dividing the space betweensaid shells into compartments or cells, the said shells extendingthroughout the longitudinal and vertical depth of said hull and eachconforming to the longitudinal and vertical outline there- Gopies ofthis patent may be obtained for my hand in presence of two subscribingWitnesses.

CHARLES CRQlVLEY. Witnesses:

RICHARD SPARROW, U. W. BURKE.

five cents each, by addressing the Gommissioner of Patents, Washington,I). 0

